Method of making clamps



July 17, 1928.

W. R. BARNEY METHOD OF MAKING CLAMPS Filed March 23, 1925 Arm nsvs' Patented July 17, 1928.

U N I T a v WILLIAM R. BARNEY, 0F TULSA,

' METHOD or MAKING cranes.

Application filed March 23, 1925. Seria1 No. 17,682..

This invention 7 relates generally to methods of making clamps, and particularly to a method of producing an improved anchor'and casing or type used in oil wells for supporting the casing or tubing of said oil wells.

Prior to this invention clamps off the type disclosed herein. were sov produced that rather rough and unfinished articles resulted, said clamps being made with very little concern as to exact. fits between said clamps and the articles with which-they were to be associated. In other words, if the condition of a clamp of the type heretofore used was such that merely an approx imate fit was obtained between said clamp and the casing or tubing with which it was used, this was considered sufficient. v

As stated above clamps of the type disclosed herein are used for supporting casings or tubings in oil wells,said clamps being usually arranged immediately beneath ing collars associated with the casings. The clamps are adapted to frictionally grip the casin or tubing with which they are associated, and also because of the location of said clamps immediatelybeneath the casing collars a positive seat is provided for said casing collar. The casing collars mentioned are so produced that they are provided with rounded corners at the points where .the annular side faces of said casing collars meet the top and bottom faces thereof. As

stated above the clamps are usually arranged immediately beneath casing collars on the supporting casings or tubing and because of the comparatively loose fit of the clamps heretofore used with respect to the casing or tubing there was a tendency for the more or less tapering bottom faces of the casing collars to be forced into the openings within the clamps. The result of this was that the great weight of the casing or tubing either caused said casing or tubing to slip through the clamp or the strain caused by the casing collar being forcedthr-ough the clamp resulted in the bolts of the clamp being sheared.

To eliminate the trouble encountered in connection with the clamps heretofore used, I have devised the clamp disclosed herein which is so made and so arranged on the casing or tubing with which it is associated that a very firm frictional grip is obtained on the casing or tubing and also tubing clamp of the extended said clamps are provided with smooth faces which provide very positive seats for the casing collars an'd'for the clainpfit'self.

Fig. I is a plan view of the associated elements of one of my improved clamps showing the samein their original rough form before they have beencfinished.

Fig. II. illustrates the elements shown in Fig. I as they will appear when they are arranged for the final finishing operations. I Fi'g.' III is across section of a casing or tubing showing a clamp, associated there-' with, said clamp beingshown in plan.

F ig.

of a casing or tubing.

Fig. ,V is afsectionv on --the line V-V of Fig. IV but showing the fragment offthe casing or tubing in elevation.

In the drawing A designates my improved ses'a pair of clamping members 1 and :2. .The clamping members lfand'Q are each provided with an outwardly bowed portion 3 which when arranged in cooperation with each other provide a circular space E through which the article clampedpasses; The clamping member 1 is provided with apertures l which are adapted to be arranged in registration with similar apertures 5 formed through the clamping member 2 and odesignates bolts which are through the registering apertures of the assembled clamp whereby the clamp ing members 1 and 2 may be drawn together. B designates a fragment of a casing or tubing of the type used in oil wells which casing or tubing is provided with the ordi-' nary casing collar C. In Fig. V, I) designates a fragment of a derrick sill, orother element by which the clamp is supported.

It will be seen from the drawing that the clamp A is so arranged on the casing or tubing B that the lower face of a casing collar C rests upon the top face of said clamp Figs. IV andV In accordance with this arrangement the clamp is caused to frictionally grip the casing or tubing when the members 1 and 2 are drawn to gether by the bolts '6 andsaid clamp also provides a seat for the casing collar C whereby the casing or tubing is supported. The casing or tubing B is usually of'considerable height and consequently of great weight, and if said casing or tubing is to be properly supported by the clamp so that clamp which compri 7 IV is a side elev tron of the clamp shown in Fig. III together with'a fragment it will not slip relative to said clamp very ing members 1 and 2 I 2 as they will be when. the

firm and positive frictional contact must be obtained between the clamp and the casing ox-tubingBmndzalso a very positive seat for the casing collar C must be provided. The clamp disclosed in the present application is so constructed that the desirable-frictional grip and the necessary positive seat are provided and the manner in Whichsaid clamp s reduc d lly wt b cri ed,

i he amp ng'm m ers, end. 2 of he clamp are formed in any suitabl'e manner, such for instance, as by forging, and when circular space E will be of less diameterso formed, said clamping members present clamping members 1 and 2 together so that they will very tightly ing on which the clamp is used. 7 V

In addition to. machining the-Cireule space E I also machine the top and bottom faces of the clamp along its entire length. The-object of this operation is to provide the bottom face of the clamp With an absolutely smooth surface which Will firmly contact:

with the element by Which the clamp is sup ported and I machine the top face of the clamp to provide an absolutely square shoulder on which the casing collar jvill rest (Fig. V) so that there Will be no opportunity for the casing collar to force itselfinto the clamp.

It is apparent from the 'ioregoing that a.

clamp is provided which Will grip the cars ing or tubing With sufiicient firmness to;'preevent movement of said casingor'tiibing relathan the casing or tubing on which the clamp is to be used. Theassociated clamplng. members. 1 and 2 are then arranged as shown inFig. II, that is, the'members 1 and 2 are spaced apart from each other a short distance by Spreaders 7' and the bolts 6 are passed'through the registering apertures in said members and areprovided with suitable nuts. After the members 1 and 2 have been drawn together by the bolts 6 as closely as the spreader 7 will permit, the circular space E is machined out untilit is the exact diam ter-of he casing or, tu ng W h wh ch the clamp isto be used. It is apparent from this that when the spreaders 'Z' are removed f m. bet een the clamping m m e s 1 and the belts firwill, be capable/of drawing the amp: i in. use,"

tive to said clamp, andin addition to this said clamp is fprovlded with a seat'for a casing collar associated with the casing-or tub-' ing which seat Willvery positively support said casing collar and ehnunatean'y likelihood that the casing collar Wlll force itself into the clamp.v I I claim:

The method of'producing clamps for the support of oil Well pipes which comprises forming recesses, smaller vthan the pipe to be supported, in the inner faces of the clamping members, placing spreaders between said members, machining said inner faces so that spaces vof exactly the same diameter as the grip the casing ortub pipe are provided, then removing 'said spreaders, and machining the top and botm aces of said clamping members.

e .,ony h t im the foregoing I n o aiiix my signature.

WILLIAM BARNEY. 

